<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li>
                  <a title="全部" @click="getCoursePageVo()" href="#">全部</a>
                </li>
                <li v-for="subject in subjectNestedList" :key="subject.id">
                  <a @click="getTwoByOneId(subject.id)" :title="subject.title" href="#">{{ subject.title }}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="subject in subSubjectList" :key="subject.id">
                  <a :title="subject.title" @click="getCourseByTwoId(subject.id)" href="#">{{ subject.title }}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange' : buyCountSort!== '' }">
                <a title="关注度" @click="sortBuyCount()" href="#">关注度
                  <span :class="{hide:buyCountSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange' : gmtCreateSort!== '' }">
                <a title="最新" @click="sortGmtCreate()" href="#">最新
                  <span :class="{hide:gmtCreateSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange' : priceSort!== '' }">
                <a title="价格" @click="sortPrice()" href="#">价格&nbsp;
                  <span :class="{hide:priceSort===''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total === 0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理中...</span>
          </section>
          <!-- 数据列表 开始-->
          <article class="comm-course-list" v-else>
            <ul id="bna" class="of">
              <li v-for="course in data.items" :key="course.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="course.cover" class="img-responsive" alt="听力口语">
                    <div class="cc-mask">
                      <a :href="'/course/'+course.id" title="开始学习" class="comm-btn c-btn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+course.id" :title="course.title"
                       class="course-title fsize18 c-333">{{ course.title }}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span v-if="Number(course.price) === 0" class="fr jgTag bg-green">
                        <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                        <i class="c-999 f-fA">{{ course.buyCount }}人学习</i>
                        |
                        <i class="c-999 f-fA">{{ course.viewCount }}人浏览</i>
                    </span>
                  </section>
                </div>
              </li>
            </ul>
            <div class="clear"/>
          </article>
          <!-- /数据列表 结束-->
        </div>
        <!--分页-->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>
        <!--分页结束-->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
import course from "@/api/course";
import subject from "@/api/subject";

export default {
  data() {
    return {
      page: 1,
      data: {},
      subjectNestedList: [], // 一级分类列表
      subSubjectList: [], // 二级分类列表
      searchObj: {}, // 查询表单对象
      oneIndex: -1,
      twoIndex: -1,
      buyCountSort: "",
      gmtCreateSort: "",
      priceSort: ""
    }
  },
  created() {
    this.getCoursePageVo()
    this.getAllSubjectInfo()
  },
  methods: {
    getCoursePageVo() {
      //清空条件查询
      this.searchObj = {}
      this.subSubjectList = []
      course.getCourseApiPageVo(this.page, 8, this.searchObj).then(response => {
        console.log(response)
        this.data = response.data.data
      })
    },
    gotoPage(page = 1) {
      course.getCourseApiPageVo(page, 8, this.searchObj).then(response => {
        console.log(response)
        this.data = response.data.data
      })
    },
    //初始化一级分类
    getAllSubjectInfo() {
      subject.getAllSubject().then(response => {
        console.log(response)
        this.subjectNestedList = response.data.data.list
      })
    },
    //一级分类触发事件
    getTwoByOneId(oneId) {
      //初始化二级
      for (let i = 0; i < this.subjectNestedList.length; i++) {
        let oneSubject = this.subjectNestedList[i]
        if (oneId === oneSubject.id) {
          //3.2初始化二级列表
          this.subSubjectList = oneSubject.children
        }
      }
      console.log("this.subSubjectList:" + this.subSubjectList)
      //设置查询一级id
      //清空二级Id
      this.searchObj.subjectId = ''
      this.searchObj.subjectParentId = oneId
      //刷新页面
      this.gotoPage()
    },
    //二级分类查询
    getCourseByTwoId(twoId) {
      this.searchObj.subjectId = twoId
      this.gotoPage()
    },
    //关注度排序
    sortBuyCount() {
      this.buyCountSort = "1"
      this.gmtCreateSort = ""
      this.priceSort = ""
      this.searchObj.buyCountSort = this.buyCountSort
      this.searchObj.gmtCreateSort = this.gmtCreateSort
      this.searchObj.priceSort = this.priceSort
      //刷新页面
      this.gotoPage()
    },
    //时间排序
    sortGmtCreate() {
      this.buyCountSort = ""
      this.gmtCreateSort = "1"
      this.priceSort = ""
      this.searchObj.buyCountSort = this.buyCountSort
      this.searchObj.gmtCreateSort = this.gmtCreateSort
      this.searchObj.priceSort = this.priceSort
      //刷新页面
      this.gotoPage()
    },
    //价格排序
    sortPrice() {
      this.buyCountSort = ""
      this.gmtCreateSort = ""
      this.priceSort = "1"
      this.searchObj.buyCountSort = this.buyCountSort
      this.searchObj.gmtCreateSort = this.gmtCreateSort
      this.searchObj.priceSort = this.priceSort
      //刷新页面
      this.gotoPage()
    }
  },
};
</script>
